원자력발전소 고온 탄소강 배관의 연속 두께측정 시스템 개발

The feeder pipes of CANDU plant have been thinning due to the flow accelerated corrosion(FAC) as the operation years increased. Accurate measurement of pipe thickness is needed to estimate the thinning rate and to evaluate the remaining life. But measuring the piping thickness manually with portable equipment during power operation is impossible because of high radiation and high temperature. So KEPRI designed on-line remote thickness monitoring equipment(FACOM-F) using personal computer and ultrasonic wave. We can detect signal in bent area of the piping. The equipment was installed at Wolsong-1 NPP and validated to be used at the actual plant operation condition